... because it tries to reimplement a date-time parser. We've got one already in Foswiki which does a better job: Foswiki::Time::parseTime.

Found another error where the date type of a column could not be derived reliably if cells have spaces while the rest of the column is of type date. TablePlugin fills empty cells with nbsp and then does not strip it off again before trying to detect date type. wtf.

As a consequence sorting the table along a date-time column then fails.